2.8 sculpt sphere creates stars?
At the top right corner, you have a topdown menu called "Symmetry/Lock". In that menu you should have three options called Radial X Y Z like on that picture



From what I can see on your screencap, you should have Radial X set to 5 like on the picture, try setting it back to 1 and you should be able to sculpt normally

Hope this helped